US3899331A
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US
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Multicolor dye developer diffusion transfer processes with pyrazolo-{8 3,4d{9 {0 pyrimidines
Assignee: Polaroid Corp
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Filing: 1973-11-14
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Granted: 1975-08-12
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Expires: 1993-11-14
Abstract
Abstract This application is concerned with the use of pyrazolo(3,4d)pyrimidines in dye developer diffusion transfer processes.
Inventors
- 👤 Stanley M Bloom
- 👤 Nicholas S Hadzekyriakides
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:55
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/08; G03C8/10; G03C8/12; G03C8/14; G03C8/16; G03C1/00; G03C1/005; G03C1/06; G03C1/34
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
176 words
A DIFFUSION TRANSFER PROCESS COMPRISING EXPOSING A PHOTOSENSITIVE ELEMENT COMPRISING A BLUE-SENSITIVE SILVER HALIDE EMULSION HAVING A YELLOW DYE DEVELOPER ASSOCIATED THEREWITH, A GREEN-SENSITIVE SILVER HALIDE EMULSION HAVING A MAGENTA DYE DEVELOPER ASSOCIATED THEREWITH, AND A RED-SENSITIVE SILVER HALIDE EMULSION HAVING A CYAN DYE DEVELOPER ASSOCIATED THEREWITH, APPLYING AN AQUEOUS ALKALINE PROCESSING COMPOSITION TO SAID EXPOSED PHOTOSENSITIVE ELEMENT TO EFFECT DEVELOPMENT AND TO FORM AN IMAGEWISE DISTRIBUTION OF UNOXIDIZED DYE DEVELOPER IN UNDEVELOPED AREAS OF EACH OF SAID SILVER HALIDE EMULSIONS AS A FUNCTION OF SAID DEVELOPMENT, SAID PROCESS INCLUDING THE STEP OF TRANSFERRING BY DIFFUSION AT LEAST A PORTION OF SAID IMAGEWISE DISTRIBUTIONS OF UNOXIDIZED DYE DEVELOPER TO AN IMAGE-RECEIVING LAYER IN SUPERPOSED RELATIONSHIP THEREWITH TO THEREBY PROVIDE A MULTICOLOR DIFFUSION TRANSFER IMAGE, SAID DEVELOPMENT BEING EFFECTED IN THE PRESENCE OF A PYRAZOLO(3,4D)PYRIMIDINE OF THE FORMULA 3,6-DI(Y-),4-X-1H-PYRAZOLO(3,4-D)PYRIMIDINE WHEREIN EACH Y IS HYDROGEN OR A 1 TO 5 CARBON ALKYL GROUP AND X IS HYDROGEN, -NH2 OR -NH-R, R BEING A 1 TO 5 CARBON ALKYL GROUP OR AN ARALKYL GROUP OF 7 TO 10 CARBONS.
Claim 2
Dependent Claim
176 words
A DIFFUSION TRANSFER PROCESS COMPRISING EXPOSING A PHOTOSENSITIVE ELEMENT COMPRISING A BLUE-SENSITIVE SILVER HALIDE EMULSION HAVING A YELLOW DYE DEVELOPER ASSOCIATED THEREWITH, A GREEN-SENSITIVE SILVER HALIDE EMULSION HAVING A MAGENTA DYE DEVELOPER ASSOCIATED THEREWITH, AND A RED-SENSITIVE SILVER HALIDE EMULSION HAVING A CYAN DYE DEVELOPER ASSOCIATED THEREWITH, APPLYING AN AQUEOUS ALKALINE PROCESSING COMPOSITION TO SAID EXPOSED PHOTOSENSITIVE ELEMENT TO EFFECT DEVELOPMENT AND TO FORM AN IMAGEWISE DISTRIBUTION OF UNOXIDIZED DYE DEVELOPER IN UNDEVELOPED AREAS OF EACH OF SAID SILVER HALIDE EMULSIONS AS A FUNCTION OF SAID DEVELOPMENT, SAID PROCESS INCLUDING THE STEP OF TRANSFERRING BY DIFFUSION AT LEAST A PORTION OF SAID IMAGEWISE DISTRIBUTIONS OF UNOXIDIZED DYE DEVELOPER TO AN IMAGE-RECEIVING LAYER IN SUPERPOSED RELATIONSHIP THEREWITH TO THEREBY PROVIDE A MULTICOLOR DIFFUSION TRANSFER IMAGE, SAID DEVELOPMENT BEING EFFECTED IN THE PRESENCE OF A PYRAZOLO(3,4D)PYRIMIDINE OF THE FORMULA 3,6-DI(Y-),4-X-1H-PYRAZOLO(3,4-D)PYRIMIDINE WHEREIN EACH Y IS HYDROGEN OR A 1 TO 5 CARBON ALKYL GROUP AND X IS HYDROGEN, -NH2 OR -NH-R, R BEING A 1 TO 5 CARBON ALKYL GROUP OR AN ARALKYL GROUP OF 7 TO 10 CARBONS.
Claim 3
Dependent Claim
16 words
A diffusion transfer color process as defined in claim 1 wherein said pyrazolo-(3,4d)pyrimidine is pyrazolo-(3, 4d)pyrimidine.
Claim 4
Dependent Claim
16 words
A diffusion transfer color process as defined in claim 1 wherein said pyrazolo-(3,4d)pyrimidine is 4-aminopyrazolo-(3, 4d)pyrimidine.
Claim 5
Dependent Claim
15 words
A diffusion transfer color process as defined in claim 1 wherein said pyrazolo-(3,4d)pyrimidine is 4-benzylamino-pyrazolo-(3,4d)pyrimidine.
Claim 6
Dependent Claim
23 words
A diffusion transfer color process as defined in claim 1 wherein there is also present during development a 6-alkylamino purine of the formula:
Claim 7
Dependent Claim
17 words
A diffusion transfer color process as defined in claim 5 wherein said 6-alkylamino purine is 6-benzylamino purine.
Claim 8
Dependent Claim
35 words
A diffusion transfer color process as defined in claim 1 wherein said pyrazolo-(3,4d)pyrimidine is present in said processing composition in a concentration of about 0.1 to about 1 percent by weight of said processing composition.
Claim 9
Dependent Claim
35 words
A diffusion transfer color process as defined in claim 1 wherein said pyrazolo-(3,4d)pyrimidine is present in said processing composition in a concentration of about 0.1 to about 0.7 percent by weight of said processing composition.
Claim 10
Dependent Claim
44 words
A diffusion transfer color process as defined in claim 1 wherein a layer containing titanium dioxide is positioned between said image-receiving layer and said silver halide emulsions whereby said transfer image may be viewed without separating said image-receiving layer from said silver halide emulsion.
Claim 11
Dependent Claim
21 words
A diffusion transfer color process as defined in claim 9 wherein said titanium dioxide is initially present in said processing composition.
Claim 12
Dependent Claim
136 words
A photographic product for use in forming a diffusion transfer image in color comprising a photosensitive element comprising a support carrying a blue-sensitive silver halide emulsion having a yellow dye developer associated therewith, a green-sensitive silver halide emulsion having a magenta dye developer associated therewith, and a red-sensitive silver halide emulsion having a cyan dye developer associated therewith; a second, sheet-like element positioned in superposed or superposable relationship with said photosensitive element; an image-receiving layer positioned in one of said elements; a rupturable container releasably holding an aqueous alkaline processing composition adapted, when distributed between a pair of predetermined layers carried by said photosensitive element and said second element, to develop said silver halide emulsions and provide a diffusion transfer image in color on said image-receiving layer; said processing composition including a pyrazolo-(3,4d)pyrimidine of the formula
Claim 13
Dependent Claim
136 words
A photographic product for use in forming a diffusion transfer image in color comprising a photosensitive element comprising a support carrying a blue-sensitive silver halide emulsion having a yellow dye developer associated therewith, a green-sensitive silver halide emulsion having a magenta dye developer associated therewith, and a red-sensitive silver halide emulsion having a cyan dye developer associated therewith; a second, sheet-like element positioned in superposed or superposable relationship with said photosensitive element; an image-receiving layer positioned in one of said elements; a rupturable container releasably holding an aqueous alkaline processing composition adapted, when distributed between a pair of predetermined layers carried by said photosensitive element and said second element, to develop said silver halide emulsions and provide a diffusion transfer image in color on said image-receiving layer; said processing composition including a pyrazolo-(3,4d)pyrimidine of the formula
Claim 14
Dependent Claim
13 words
A photographic product as defined in claim 11 wherein said pyrazolo-(3,4d)pyrimidine is pyrazolo-(3,4d)pyrimidine.
Claim 15
Dependent Claim
13 words
A photographic product as defined in claim 11 wherein said pyrazolo-(3,4d)pyrimidine is 4-aminopyrazolo-(3,4d)pyrimidine.
Claim 16
Dependent Claim
13 words
A photographic product as defined in claim 11 wherein said pyRazolo-(3,4d)pyrimidine is 4-benzylamino-(3,4d)pyrimidine.
Claim 17
Dependent Claim
28 words
A photographic product as defined in claim 11 wherein said second element includes said image-receiving layer carried by a transparent support, and said processing composition includes titanium dioxide.
Claim 18
Dependent Claim
33 words
A photographic product as defined in claim 11 wherein said pyrazolo-(3,4d)pyrimidine is present in said processing composition in a concentration of about 0.1 to about 1 percent by weight of said processing composition.
Claim 19
Dependent Claim
33 words
A photographic product as defined in claim 11 wherein said pyrazolo-(3,4d)pyrimidine is present in said processing composition in a concentration of about 0.1 to about 0.7 percent by weight of said processing composition.
Claim 20
Dependent Claim
20 words
A photographic product as defined in claim 11 wherein said processing composition also includes a 6-alkylamino purine of the formula
Claim 21
Dependent Claim
15 words
A photographic product as defined in claim 18 wherein said 6-alkylamino purine is 6-benzylamino purine.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |